JPS5925960B2 - gun firing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radial firing device for firing ammunition with a detonator on its outer periphery (for example of the type described in Italian Patent No. 932,381 and No. 972,058).

Previously known percussion devices were mostly used for firing conventional ammunition of the center or annular percussion type.

The present invention relates to a firing device for a gun that uses self-propelled ammunition with a detonator on its outer periphery, and does not require the use of a conventional firing device (for example, a spring or lever-based recoil firing pin) when firing the above-mentioned ammunition. All attempts to do so failed due to deformation and scarring of the bullet's outer wall.

During firing, when the firing pin strikes the outer wall of the bullet at the detonator, the recoil force of the bullet is so strong and rapid that the firing pin recoil mechanism cannot force the firing pin to retreat before firing the bullet from the barrel. .

As a result, the firing pin scars and deforms the bullet, thus creating aerodynamic changes in the trajectory of the bullet, reducing firing accuracy.

An object of the present invention is to provide a percussion device that can prevent the above-mentioned defects.

In the radial firing device of a gun according to the present invention, the firing pin is bored in the upper part of the breech tube and disposed in an inclined hole communicating with the chamber, and the axis of the firing pin is set so that the tip thereof is on the closed surface of the breech tube. The hammer is rotatably attached to the breech on the breech barrel, and a leaf spring is provided at the top of the bolt, and the bolt stops at the front end of the leaf spring against the closed surface of the breech barrel. It has an upwardly bent portion at the front so that its front end can collide with the rear end of the hammer.

The device according to the invention, by means of which the firing pin is lifted back into the bore when the bullet begins to travel, in order to prevent deformation or scarring of the bullet, is illustrated by an example of its use in a gun with a percussion plumb bolt. Then, its main components are as follows: A - Firing pin located at the top of the breech barrel.

B - Hammer rotatably attached to the breech on the breech barrel.

C - L-shaped leaf spring for the firing pin, which is restrained at one end of the upper part of the bolt.

D - Percussion plumb bolt with a closing rod extending from the surface that contacts the breech face.

A) A firing pin accommodating hole is bored in the upper part of the breech barrel, and the accommodating hole opens into the chamber at the position of the bullet where the detonator is disposed on the outer periphery of the gunpowder loading section.

This bore, with the firing pin mounted therein, is beveled in such a way that the tip of the firing pin is deflected toward the closing surface of the breech tube.

Since the firing pin does not have a recoil spring, its weight always causes its tip to protrude into the chamber when the chamber is empty, or when a bullet is loaded into the barrel. In some cases, the bullet tends to abut or maintain itself in either state.

The firing pin slope prevents firing of the bullet from forcing the firing pin upwardly, thereby deforming or scarring the bullet.

The force exerted on the firing pin by the fired bullet is also aided by the action of the gas pressure raised by the explosion of the charge, which is disposed radially in the chamber and which forces the rear end into the firing pin. The firing pin is pressed upward through a passage communicating with the hole in the firing pin.

When firing a firearm, gas pressure not only acts on the bullet, but also on the tip of the firing pin, which pushes it upward through a radial path.

The upward movement of the firing pin can also be facilitated by the action of the hammer striking the firing pin to fire.

B) The device according to the invention uses a very lightweight hammer which is rotatably mounted on the breech barrel and has the form of a double-armed lever.

This firing pin is always urged away from the firing pin by a leaf spring that has one end fixed to the breech and the other end acting on the rear of the firing pin.

C) The hammer is driven by an L-shaped leaf spring, which is fixed to the bolt and strikes the rear of the hammer, but does not follow the hammer during its movement.

In this method, the hammer is rotated in a counterclockwise direction at such a speed as to generate sufficient kinetic energy to strike the firing pin to ensure firing of the bullet already loaded in the barrel.

The firing pin is very light and the leaf spring biases the firing pin away from the firing pin so that when the bullet is fired forward the firing pin is already almost completely separated from the firing pin, so the bullet is pushed very slightly by the firing pin. The motion imparted to the hammer by the L-shaped leaf spring is reversed very quickly so that it encounters only a certain amount of resistance.

This serves to prevent bullet scarring.

D) The bolt supporting the L-shaped leaf spring on its upper part is formed in the shape of a striking weight.

However, this bolt is different from conventional bolts in that a closing rod is disposed within the bolt, and this closing rod protrudes from the front closing surface of the bolt toward the breech barrel surface, and after taking up the bullet from the magazine. , which has the effect of introducing the bullet into the barrel and thus enters the chamber by a predetermined length so as to form a closure member for the bullet.

With this configuration, the inertial body of the bolt begins to recoil as a result of the increased gas pressure due to the explosion of the charge, so that the closure of the gun is maintained even when the closing rod is sufficiently ejected from the chamber. In the case of this type of bullet, the cartridge case can be eliminated without excessively increasing the weight of the bolt relative to conventional percussion weight bolts.

The present invention will be described in detail below with reference to an embodiment of a percussion device having a hammer-shaped bolt bottom. The bolt is shown, and in this stroke the bullet 5 is taken up from the magazine 6 of the repeating gun and introduced into the chamber 4 by means of a closing rod 7 fixed to the bolt 8 by a pin 9, the movement being caused by the recoil spring 10.

During this closing stroke, the hammer 19, which is pivotally attached to the breech 2 by the pivot 15, is held out of engagement with the firing pin 20 by the leaf spring 18, and the leaf spring 18 is fixed to the cover 13 by the rivet 14, A roller 1 rotating about a pivot 17 to limit friction between the contact member and the hammer
It contacts the rear end of hammer 19 made up of 6.

Furthermore, the firing pin 20 is mounted on the top of the breech tube 22 in an inclined position in a hole that is inclined with its tip toward the closed surface of the breech tube, and when there is no bullet 5 in the chamber 4, the ring nut 21
The firing pin 20 held by the firing pin 20 has one end protruding into the chamber 4 provided in the breech tube 22.

Furthermore, the passage 3 is arranged radially in the chamber 4, the leaf spring 12 is fixed to the bolt 8 by a pin 11, and the leaf spring 12 is fixed to the bolt 8 by a pin 11.
The front end of the hammer 2 is bent into an L shape and has the purpose of hitting the roller 16 at the rear end of the hammer 19.

When the bullet 5 is introduced into the chamber 4 by the closing rod 7 in FIG. ing.

Furthermore, before the bolt 8 contacts the closing surface of the transition tube 22, the L-shaped front end of the leaf spring 12 contacts the roller 16 of the hammer 19, and the hammer 19 is still not engaged with the firing pin 20 by the leaf spring 18. Retained.

Since the contact between the roller 16 and the L-shaped end of the leaf spring 12 is a resilient contact, little of the velocity imparted to the bolt 8 by the recoil spring 10 is lost.

When the bolt 8 has completed its closing stroke, there is a short delay in counterclockwise rotation of the hammer due to the action of the leaf spring 18 and the shape of the hammer 19.

This short delay causes the force generated by the mass and velocity of the bolt 8 to place the L-shaped end of the leaf spring 12 under tension while at the same time imparting counterbalance to the bolt 8 against the closed surface of the transition piece 22. At the same time, the leaf spring 12 is connected to the roller 1 at the rear end of the hammer 19.
When the energy stored in 6 is released, hammer 19 overcomes the resistance of leaf spring 18 and begins to rotate counterclockwise about pivot 15.

As can be seen in Figure 3, the speed that the firing pin 19 attains at this time is so high that when it collides with the firing pin 20, the firing pin 20 generates kinetic energy that causes the firing and ignites the detonator on the outer periphery. let

As is clear from FIG. 3, the leaf spring 12 does not follow the hammer 19 as it rotates about the pivot 15, but the leaf spring 12 moves at such a speed that it generates sufficient energy to strike the bullet 5. The force necessary to rotate counterclockwise is applied to hammer 19.

The recoil of bullet 5 upon firing is extremely rapid.

As seen in FIG. 4, the bullet 5 immediately begins to move forward, thereby retracting the firing pin 20 into the provided seat without deforming or scarring the bullet 5.

This is possible because the firing pin 20 does not resist the action of the bullet 50 at this point.

This is because the firing pin 19 is very lightweight, so its thrust acting on the firing pin 20 is instantly exhausted, and is helped by the action of the leaf spring 18 which urges the firing pin 19 upwards, while the bolt 8 closes the breech tube 22. It is based on the fact that it still remains in a fixed position relative to the surface.

The gas pressure increased by the explosion of the charge acts on the tip of the firing pin 20 through the radial passage 3 disposed in the chamber 4, thereby pushing the firing pin 20 into the seat disposed in the ring nut 21. be pulled inside.

The bullet 5 is thus fired from the barrel 1 without being deformed or scarred by the firing pin 20.

The bolt 8, which at this stage still remains in a fixed position relative to the closed surface of the transition piece 22, begins to move rearwardly towards the unclosed position under the action of the gas pressure generated by the explosion of the charge, but The rod 7 is fully retracted from the chamber 4 in the breech tube 22, keeping the gun closed.

This prevents inflation gas from escaping through the bolt surface, which would compromise the seal of the device and the safety of the shooter.

It is thus possible to eliminate the cartridge case in the new type of projectile without impairing the operation of the device according to the invention.

The above-described device thus achieves the objective of obtaining a new type of projectile percussion without imparting deformations or blemishes that cause aerodynamic changes in its trajectory which impair its shooting accuracy.

Without departing from its purpose and spirit, the present invention
The present invention can also be applied to other embodiments than those described above.

Therefore, the above embodiments of the present invention are for illustrative purposes only and are not meant to be limiting in scope.

[Brief explanation of the drawing]

The figures show an embodiment of the percussion device of the invention in different stages of operation, FIG. 1 having a bolt which begins to be moved into the closed position by a recoil spring and a bolt closing rod which begins to load the bullet into the barrel. FIG. 2 is a cross-sectional view of the percussion device, and FIG. 3 is a cross-sectional view of the percussion device having a bolt with a bullet already loaded in the gun barrel and an L-shaped leaf spring fixed to the upper part of the bolt that strikes against the hammer. The bolt in the closed position and the L fixed to the bolt
4 is a sectional view of a percussion device with a firing pin in a striking position which produces a percussion of the charge on the periphery of the bullet by the action of a shaped leaf spring; FIG. FIG. 4 is a cross-sectional view of the firing device showing the firing pin being moved out of engagement with the firing pin by a force generated by a leaf spring holding the firing pin at its rear end; DESCRIPTION OF SYMBOLS 1... Barrel, 2... Breech, 3... Radial passage in the chamber, 4... Chamber, 5... Bullet, 6... Magazine, 7... Closure Rod, 8... Impact weight type breech, 10
...Reaction spring, 12... Leaf spring, 15, 17...
Pivot, 16...Roller at the end of hammer, 18...
Leaf spring, 19... firing pin, 20... firing pin, 22...
Tail tube.

Claims (1)

[Claims] 1. A firing pin is slidably disposed in an inclined hole bored in the upper part of the breech tube and communicated with the chamber, so that the tip of the firing pin faces toward the closed surface of the breech tube. The axis of the firing pin is tilted, the firing pin is rotatably attached to the breech on the breech barrel, and a leaf spring is fixed to the breech and presses against the rear end of the firing pin to bias the firing pin away from the firing pin. A firearm using a cartridge without a cartridge and having a detonator on its outer periphery, characterized in that a plate spring is provided on the upper part of the bolt, and the front end of the plate spring is provided with an upwardly bent part for striking the rear end of the hammer. Firing device. 2. The device according to claim 1, wherein the upper end of the inclined hole is fitted with a ring nut for slidably retaining the firing pin in the inclined hole. 3. The device according to claim 1, characterized in that the inner wall of the chamber is provided with a passage communicating with the inclined hole. 4. The device according to claim 1, wherein the hammer is formed from a double-arm lever made of extremely thin material, and a roller is attached to the rear end of the double-arm lever. 5. A closing rod is disposed in the bolt, the closing rod projects from the front closing surface of the bolt toward the tail tube surface, and is inserted into the chamber in the tail tube by a predetermined length. An apparatus according to claim 1.